Spatial, temporal, and anthropogenic hydraulic and sediment transport regimes effecting river channel changes and habitat structures

两个研究领域将在城市河流水力学和生态水力学。这两个研究方向有助于不断增长的知识，在河流栖息地环境及其固有的复杂性，同时解决有关河流恢复，城市土地利用开发和基础设施更新的相关问题。 第一个研究课题是一个15年的研究，探讨城市河流渠道的准平衡特性的扩展。正在进行的床料采样（路面，子路面，和底沙）已确定的粒度级运输的季节性趋势，其中增加的砂部分在春季，假设是来自冬季道路砂作业的冲刷量的结果，已观察到。小的工作已经进行的砾石床流的砂馏分增加对通道的稳定性和由此产生的栖息地结构的影响。这项研究计划的目的是检查，如果增加道路砂光是有助于城市渠道的变化，并通过检查一系列的城市和农村流达到准平衡和干扰条件下，从而导致河岸栖息地。 第二项研究计划是部署声学多普勒流速仪（ADV）和脉冲相干声学多普勒剖面仪（PCADP）（2006年由CFI-LOF资助），以调查高流量和洪水条件下的流动结构。该研究指令正在研究河流产卵鱼在redd，riffle和reach规模（例如，在单个riffle上平均40，000次速度测量）的产卵选择偏好，基于流体特性和制度。拟议的研究计划是扩大到更高的流量制度对通道形成流和那些保持通道形态和栖息地结构之间的联系的实地研究。 对这一领域的进一步研究将检查用于河流修复项目的流结构和能量损失，以提高设计的成功率。

Two areas of research will be pursued in urban river hydraulics and eco-hydraulics. Both research directives contribute to growing knowledge in lotic habitat environments and their inherent complexity while simultaneously addressing pertinent questions related to river restoration, urban land use development, and infrastructure renewal. The first research topic is an expansion of a 15 year study examining the quasi-equilibrium characteristics of urban stream channels. On-going bed material sampling (pavement, sub pavement, and bedload) has identified seasonal trends in grain size fraction transport whereby an increased sand fraction in the spring season, hypothesized to be a result of washload derived from winter road sanding operations, has been observed. Little work has been undertaken on the effects of increased sand fractions in gravel-bed streams on channel stability and resulting habitat structure. The purpose of this research initiative is to examine if increased road sanding is contributing to urban channel changes and resulting riparian habitat by examining a series of urban and rural stream reaches in both quasi-equilibrium and disturbed conditions. The second research initiative is the deployment of Acoustic Doppler Velocity meters (ADV's) and Pulse Coherent Acoustic Doppler Profilers (PCADP) (which were funded from a CFI-LOF in 2006) to investigate flow structure in high flow and flood conditions. This research directive is examining the spawning selection preferences of river spawning fish at the redd, riffle and reach scale (averaging 40,000 velocity measurements on a single riffle, for example) based upon fluid properties and regimes. The proposed research initiative is to expand field studies into higher flow regimes towards the nexus between channel forming flows and those which maintain channel morphology and habitat structure. Further research into this field will examine the flow structure and energy losses of in-stream structures used in river restoration projects to improve design success.